Is chemical straightening only for curly hair?
No, chemical straightener is formulated specifically for curly,
wavy, frizzy, or hair with lots of volume. Technically speaking,
you can put chemical straightener on any hair type and it will make
it less wavy, curly, or frizzy. (Note: Some heat straighteners can
actually make hair frizzier, because it heats your hair, which can
burn it and encourage split ends.)